De Agricultura
Philo Judaeus
The works of Philo Judaeus, the contemporary of Josephus, volume 1. Yonge, C. D., translator. London: Henry G. Bohn, 1854.
but above all things, that which is the one and only thing in the way of doing good, namely the abstaining from any intentional misdeeds, is of service also to keep off the incalculable number of voluntary sins; and, in the second place, even of those which are involuntary, they are but few which are committed, and they do not cling to a person for any very long time.